#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<cstring>
using namespace std;
const int N = 110, M = 4510;
int f[N][N];
int n, m;
int main()
{
    cin >> n >> m;
    memset(f, 0x3f, sizeof(f));
    for (int i = 1; i <= n; i++)
    {
        f[i][i] = 0;
    }
    for (int i = 1; i <= m; i++)
    {
        int u, v, w;
        cin >> u >> v >> w;
        f[v][u] = f[u][v] = min(f[u][v], w);
    }
    for (int k = 1; k <= n; k++)
    {
        for (int i = 1; i <= n; i++)
        {
            for (int j = 1; j <= n; j++)
            {
                f[i][j] = min(f[i][j], f[i][k] + f[k][j]);
            }
        }
    }
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n; j++)
        {
            cout << f[i][j] << " ";
        }
        cout << endl;
    }
    return 0;
}